Means for disinfecting dumb-waiter shafts and the like.



D.'FRAAD. v

MEANS FOR DISINFECTING DUMB WAITER SHAFTS AND THE LIKE.

APPUCATION FILED JULYZZ, 1915.

Patented Jan. 4, 1916.

- COLUMBIA PLANQGRAPH go-,WASHINGTON, D. C.

DANIEL rnnnn, or Bnoo nY new Yort'x.

eans Eon nrsrnrncrine pum s-warren sr ar'rs enn'rn n inn To allwhom itmay concern Be it known that I, DANIEL FRAAD, a citizen of the UnitedStates of America, re-

sidin at Brookl n Kin s count 1 and State- 23 7 b 7 of New York, haveinvented certain new and useful Improvements in lvleans for DisinfectlngDumbamer Shafts and the like,

' of which the following is a full, clear, and

exact description.

This invention relates to an apparatus for disinfecting shafts, such asthe dumb-waitershafts of apartment houses, but my improvement may, byslight rearrangemenhbe made adaptable for use in connection with publictoilet-rooms, stables, etc.

Theobject of invention is to provide effective means whereby adisinfecting medium can be introduced into a dumbwaiter shaft or thelike to counteract the effects of gases or deleterious odors arisingfrom the garbage which is usually passed through the shaft on thedumb-waiter, from the several apartments having access to the shaft. I

My improved device is of course adapted to disinfect such shafts againstany impurities which may find their way into the shaft.

One of the features of my invention is the diffusion of the disinfectingmedium by a plurality of air-blast devices, special means being providedto produce such air-blasts.

I will now proceed to describe my invention in detail, the essentialfeatures of which will be summarized in the appended claims, referencebeing had to the accompanying drawings, forming part hereof; wherein'Figure 1 is a diagrammatic sectional view, broken away, of adumb-waitereshaft having my improvement installed therein; Fig. 2 is anenlarged vertical sectional view of a portion of my improved device; andFig. 3 is a side view, on a reduced scale, looking from the left in Fig.2. I

In the accompanying drawing, a dumbwaiter-shaft is indicated by 1, andthe dumbwaiter, which travels'in the shaft, by 2; a plurality ofapartments are indicated by 3, 1, 5, 6, 7 and 8, and 9 indicates theopening or door at each floor communicating with the shaft. The numeral10 indicates the basement, and 11 the opening in the shaft at thebasement. V p

12 indicates a shed or room on the roof with which most apartmentbuildings are usually provided.

One feature of my improvement comprises Specification of Le ttersIEfatent.

stand-. pipe. 13, leading from a tank 1 1 in theshed- 12 tot-he basement10, the said. pipe being preferably located against one of theside-walls of theshaft, as shown in 'Fig. 3. The tank 1 1 is arranged tocontain a suitable disinfectant, in liquid form, and to deliver same tothe pipe 13, a valve 15"being employed to control the flow of theliquid.

' Within the pipe 131 place a suitable, absorbent 16 (Fig. 2) which willbecome impregnated or soaked with the disinfectant. The disinfectantwill, by natural process of evaporatiom-pa'ss through the openings 17,in the pipe 13 and into the shaft 1.

At intervals throughout the length of the pipe 13, I place catch-basinsor cups 18 which are also filled with an absorbent '19. Eachset ofopenings 17 haslocated adjacent theretoa catch-basin lS. -A set ofopenings '17 and a catch basin 18 are located preferably opposite eachpair of dumb-waitershaft openings 9, as shown in Fig. 1, the said setsbeing preferably alternated in position.

The function of thebasins 18 is to catch any of the disinfectant thatmay drip through the openings 17. Should the drippings be excessive andsaturate the absorb- Paten dn 519 6. Application filed. July 22,1915. sriain aisas. I

ent 19 inthe cups 18, the surplus liquid will find its way back into thepipe 13 through a passage 20 (Fig. 2). At the bottom of the pipe 13, Iplace a pan 21 to catch any of the disinfectant that may, in'liquidform, find its way to the bottom of the shaft.

A further feature of my invention consists of means to diffuse thedisinfectant.

through the shaft. fectant I employ air-blasts supplied by suitablemechanism preferably operated by the movement of the dumb-waiter 2. Ipreferably employ a plurality of bellows 22, each To diffuse the disin-vof which, by means of a duct 23, is connected i to each catch-basin 18;that isto say each basis 18 has connected thereto a bellows 22. Eachbellows may be secured to the adjacent wall of the shaft or to the pipe13. To operate the bellows, I provide the dumb-waiter with a rail 24wide enough to actuate all of the bellows 22. Each bellows carries anarm 25'provided with a roller 26 located in the path of movement of therail 24k. A spring 27 keeps the bellows normally expanded or extended.When the rail 24: strikes the roller 26, either upon theupward or downward movement of the dumb-waiter, the movable member 28 of the bellowswill be forced inwardly thereby forcing a blast of air into its attachedbasin 18, Which Will agitate the absorbent contained in thebasin and thefumes Will escape through the top thereof into the shaft 1, thusdiffusing the disinfectant. Each time the dumb-Waiter is operated up ordown, the bellows 22 will automatically be operated, thereby forcing ablast of air into the basins 18. To prevent the manipulation of thecontrolling valve 15, excepting by the proper person, It may pro videthe same with a removable handle, or I may lock the same.

l iaving now described my invention, What I claim and desire to secureby Letters Pattent is: i

l. A disinfecting apparatus, consisting of a pipe arranged to receive adisinfecting medium, said pipe being provided with openings, and a catchbasin adjacent said openings.

2. A disinfecting device, consisting of a pipe provided withperforations, a basin adjacent thereto and in communication With saidpipe, and means to force air into said basin.

3. A disinfecting device consisting of a receptacle provided withopenings at interals throughout its length, an auxiliary receptacleadjacent each set of openings, and means to force air into saidauxiliary receptacles.

In combination With a dumb-Waiter, a shaft therefor, a receptacle Withinsaid shaft arranged to receive a disinfectant, an auxiliary receptaclealso arranged to receive a disinfectant, and means operable by themovement of the dumb-Waiter to force air into the auxiliary receptacle.

In combination with a dumb-Waiter, a shaft therefor, a stand-pipe Withinsaid shaft extending through substantially the ength thereof, a supplytank for said pi ae, purality of groups of alternately posi- 'iozedopenings in said pipe, an absorbent material. in said pipe, means tointroduce a liquid disinfecting medium into said pipe, and a catch-basinadjacent each set of openings arranged to receive any of the liquidoisinfectant that may drip through said openii'igs, there being a ductleading from said basin to said pine.

in combination with a dumb-Waiter, a shaft therefor, a standpipe Withinsaid shaft extending through substantially the length thereof, a supplytank for said pipe, a plurality of groups of alternately positionedopenings in said pipe, an absorbent material in said pipe, means tointroduce a liquid disinfecting medium into said pipe, a

catch-basin adjacent each set of openings arranged to receive any of theliquid disinfectant that may drip through said openings, there bein aduct leading from said lasin to said pipe, and means to force air intosaid catch-basins.

7. in combination with a dumb-Waiter, a shaft therefor, a stand-pipeWithin said shaft extending through substantially the length thereof, asupply tank for said pipe, a plurality of groups of alternatelypositioned openings in said pipe, an absorbent material in said pipe,means to introduce a liquid disinfecting medium into said pipe, aatoll-basin adjacent each set of o enings aranged to receive any of theliquid disinectant that may drip through said opengs, there being a ductleading from said asin to said pipe, and means operable by re movementof the dumb-Waiter to force lir into said catch-basins.

8. in combination with a dumb-Waiter, a t therefor, stand-pipe Withinsaid iaft extending through substantially the *ngth thereof, a supplytank for said pipe,

pi rality of groups of alternately posi tioned openings in said pipe, anabsorbent mater'al in said pipe, means to introduce a liquiddisinfecting medium into said pipe, a catch-basin adjacent each set ofopenings arranged to receive any of the liquid disinfectant that maydrip through said openings, there being a duct leading from said basinto said pipe, and means operable by the movement the Cl11111i3-Wfilt6Ito agitate the disinfectant Within the catch-basins.

9. In combination with a dumb-Waiter, a

shaft therefor, a stand-pipe Within said shat-t arranged to receive adisinfectant,

atch-basins adjacent said stand-pipe, a belows communicating with eacncatch-basin, ,nd means carried by the dumb-Waiter to perate saidbellows.

10. In combination With a dumb-Waiter, a shaft therefor, a stand-pipeWithin said shaft arranged to receive a disinfectant, catch-basinsadjacent said stand-pipe, a bellows communicating with each catch-basin,means carried by the dumb-Waiter to operate said bellows, and a springto restore the bellows to normal condition after each actuation thereof.

Signed at New day of July, 1915.

York city, N. Y. this 1 DANIEL FRAAD.

Witnesses MAURICE BLOCK,

EDWARD A. JARVIS,

Copies Of this patent may be obtained for five cents each, by addressingthe uommissioner 0f Eatents= Washington, D. C.

